63 research outputs found
Observation of the Helium 7 Lambda hypernucleus by the (e,e'K+) reaction
An experiment with a newly developed high-resolution kaon spectrometer (HKS)
and a scattered electron spectrometer with a novel configuration was performed
in Hall C at Jefferson Lab (JLab). The ground state of a neutron-rich
hypernucleus, He 7 Lambda, was observed for the first time with the (e,e'K+)
reaction with an energy resolution of ~0.6 MeV. This resolution is the best
reported to date for hypernuclear reaction spectroscopy. The he 7 Lambda
binding energy supplies the last missing information of the A=7, T=1
hypernuclear iso-triplet, providing a new input for the charge symmetry
breaking (CSB) effect of \Lambda N potential.Comment: 5 pages, 4 figures, submitted to PR
Measurements of Non-Singlet Moments of the Nucleon Structure Functions and Comparison to Predictions from Lattice QCD for
We present extractions of the nucleon non-singlet moments utilizing new
precision data on the deuteron structure function at large Bjorken-
determined via the Rosenbluth separation technique at Jefferson Lab
Experimental Hall C. These new data are combined with a complementary set of
data on the proton previously measured in Hall C at similar kinematics and
world data sets on the proton and deuteron at lower measured at SLAC and
CERN. The new Jefferson Lab data provide coverage of the upper third of the
range, crucial for precision determination of the higher moments. In contrast
to previous extractions, these moments have been corrected for nuclear effects
in the deuteron using a new global fit to the deuteron and proton data. The
obtained experimental moments represent an order of magnitude improvement in
precision over previous extractions using high data. Moreover, recent
exciting developments in Lattice QCD calculations provide a first ever
comparison of these new experimental results with calculations of moments
carried out at the physical pion mass, as well as a new approach which first
calculates the quark distributions directly before determining moments
QCD and strongly coupled gauge theories : challenges and perspectives
We highlight the progress, current status, and open challenges of QCD-driven physics, in theory and in experiment. We discuss how the strong interaction is intimately connected to a broad sweep of physical problems, in settings ranging from astrophysics and cosmology to strongly coupled, complex systems in particle and condensed-matter physics, as well as to searches for physics beyond the Standard Model. We also discuss how success in describing the strong interaction impacts other fields, and, in turn, how such subjects can impact studies of the strong interaction. In the course of the work we offer a perspective on the many research streams which flow into and out of QCD, as well as a vision for future developments.Peer reviewe
Towards a sustainable Agri-Food supply chain
The agri-food industry is one of the largest manufacturing sectors in many developed and developing countries. This industry requires large volumes of natural resources. This resource requirement has been a key barrier to increasing production proportionately to cater to the increasing global population
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